jobs: default config to {} — config-less script tasks failed the NOT NULL insert

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/servers/api/tasks/pipeline-job-manager.ts

@@ -102,7 +102,7 @@ export async function enqueueJob(params: StartJobParams, action: 'start' | 'queu
     status: run ? 'running' : 'pending',
     inputs: params.inputs,
     cwd: params.cwd ?? null,
-    config: params.config,
+    config: params.config ?? {}, // column is NOT NULL; many script tasks have no config block
     startedAt: run ? new Date() : null,
   });
   if (run) launch(jobId, mode, params);